Chino DB650 - 6-3 Alarm Event Type

[DB600] General instruction manual
- 113 -
6-3 Alarm event type
The alarm event comes in a variety of types as shown below.
SV: Setting value MV: Output value
AL: Event value db: Event dead-band
Event output range with "Event standby" set
Normal event output range
Event activation range
Absolute value upper limit alarm
Upper limit alarm against a measured value (PV).
 Activation condition
AL < PV
 Keep condition
AL - db < PV ≤ AL
 Reset condition
PV ≤ AL - db
Absolute value lower limit alarm
Lower limit alarm against a measured value (PV).
 Activation condition
AL > PV
 Keep condition
AL ≤ PV < AL + db
 Reset condition
PV ≥ AL + db
Deviation upper limit alarm
Upper limit alarm against the difference between a setting value (SV) and measured value (PV).
 Activation condition
PV > SV + AL
 Keep condition
SV + AL - db < PV ≤ SV + AL
 Reset condition
PV ≤ SV + AL - db
Deviation lower limit alarm
Lower limit alarm against the difference between a setting value (SV) and measured value (PV).
 Activation condition
PV < SV + AL
 Keep condition
SV + AL ≤ PV < SV + AL + db
 Reset condition
PV > SV + AL + db
Event deadband (db)
Event deadband (db)
Power-ON
Power-ON
Power-ON
Power-ON
Event deadband (db)
Event value (AL)
Event deadband (db)
Event value (AL)